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Which element is the most radioactive naturally occurring element?
ChemistryRadioactivity
Quick Answer
Polonium is often described as the most radioactive naturally occurring element because all its isotopes are highly unstable. Polonium-210 is especially famous for its intense alpha radiation.
The Full Story
Polonium is one of the most intensely radioactive naturally occurring elements. Its best-known isotope, polonium-210, emits strong alpha radiation and has a short half-life of about 138 days. Because of this, polonium is extremely dangerous in large enough quantities. It was discovered in 1898 by Marie Curie and Pierre Curie and named after Poland, Marie Curie’s homeland.
Key Facts
1.Polonium-210 half-life: about 138 days
2.Discovered in 1898
3.Atomic number: 84
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"One of the most dangerous elements on Earth"